diff options
Diffstat (limited to 'ftnoir_tracker_pt/ftnoir_tracker_pt.cpp')
| -rwxr-xr-x[-rw-r--r--] | ftnoir_tracker_pt/ftnoir_tracker_pt.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/ftnoir_tracker_pt/ftnoir_tracker_pt.cpp b/ftnoir_tracker_pt/ftnoir_tracker_pt.cpp index e10cfea0..4fa70ccf 100644..100755 --- a/ftnoir_tracker_pt/ftnoir_tracker_pt.cpp +++ b/ftnoir_tracker_pt/ftnoir_tracker_pt.cpp @@ -57,8 +57,9 @@ bool Tracker_PT::get_focal_length(float& ret) { static constexpr double pi = 3.14159265359; const int w = info.res_x, h = info.res_y; - const double diag = sqrt(w * w + h * h)/w, diag_fov = static_cast<int>(s.fov) * pi / 180.; - const double fov = 2.*atan(tan(diag_fov/2.0)/sqrt(1. + diag*diag)); + const double diag = sqrt(1. + h/(double)w * h/(double)w); + const double diag_fov = static_cast<int>(s.fov) * pi / 180.; + const double fov = 2.*atan(tan(diag_fov/2.0)/diag); ret = .5 / tan(.5 * fov); return true; } |